Is there anything that can't be used to defeat a vampire?
Sunlight, garlic, crosses, holy water, stakes, fire, cutting off their heads (also works on those living statue people), and blessed bullets.
And they only enter houses after being invited in, don't have reflections, and if you're being chased you can drop some salt and they have to stop and count the grains. 
Surely the most rubbish of all the monsters.